
Since ompi_coll_base_nbc_request_t is to be used in an opal_free_list_t, it must be returned into a "clean" state. So cleanup some data in the callback completion subroutines. This fixes a regression introduced in open-mpi/ompi@0fe756d416 Signed-off-by: Gilles Gouaillardet <gilles@rist.or.jp>